Breeding material treated with colchicine tracing back to crossings between varieties and Swiss ecotypes.
Mean value of standard varieties Mean
1 = very good; 5 = medium; 9 = very poor
Row trials 2003 (LP0355) with seed harvest on 9 clone progenies from a polycross with 12 clones.
Mean of 5 experimental sites over 2 years
Base material
M0 seed
Yield Scoring scale
Literature Descent
National listing
On the Swiss List of Recommended Varieties of Forage Plants since 2011
Mean SORAYA
Results of the official Swiss variety trials 2009-2011
SORAYA
Perennial Ryegrass (4n)
Lolium perenne L.
FR (Representative: Semences Vertes) AT
Fact Sheet
DUS test conducted at Crossnacreevy, Belfast, DEFRA (UK), 2007-2010
UPOV No Characteristics State of expression Note
Soraya is the latest Swiss variety of perennial ryegrass. A crossing between late varieties from abroad with early Swiss breeding material let a variety arise which builds rapidly a lot of foliage in spring despite of the late ear
emergence.
This allows a first silage making of very high quality. Due to the very good resistance to diseases, in particular to crown rust, the good quality of fodder is
conserved also in the summer growth.
(mittelsp.-späte Sorten) (nicht publiziert)Situation in Switzerland
Situation abroad
Agronomic caracteristics
Description according to UPOV gidelines Things to know
4.5 5.0
Yield
3.3 4.0
General impression
2.3 3.1
Juvenile growth
3.7 4.2
Competing ability
3.0 3.6
Persistence
4.8 5.3
Resistance to winter conditions
2.4 3.5
Resistance to leafspots an rust
1.6 1.7
Resistance to bacterial wilt
5.0 4.5
Digestibility of the organic matter
3.2 4.2
Persistence at higher altitudes
3.4 4.0
Index (weighted average of all notes)
Ploidy tetraploid 4
1
Leaf: color in the year of sowing medium green to dark green
6 5
Time of inflorescence emergence (after vernalization)
medium 5
8
Flag leaf: length very long 9
10
Flag leaf: width very broad 9
11
Stem: length of longest stem including inflorescence
very long 9
12
